At first i can say i am not a casino owner. own Business is a very hard thing to do, you need to know about it first and you have to be an expert about that before your own. it is for all type of business. it can your physical business or virtual.

 Now when it comes to Advertising you need to keep this in mind.  You have thousands of competitor  in the market. In that case if you want to get past that competitor then you have to make people understand that your project is much better than other projects and it is much more affordable and much more profitabe. And you have to give people more offers and more profit than other projects. Then you can stay in the market otherwise you can't

And if you are looking for an advertising platform, you can also use this forum as an advertising. You can open a Announcement thread here and for boosting / Bumping your ANN you can run campaign like (Bounty /Signature) and you can search another platform like newspaper, press_Release etc